Reversing valve



fm M

1,489,490 S FORTER REVERSING VALVE Filed Jan. 19, 1923 3 Sheets-Sheet l April 8 19242- v v s. FORTER REvERsIVNG' vALvB Filed aan. 19. 192s s, sheets-sheet tllllalllllllll INVENTOR Patented Apr. 8, 1924.

PATENT clinician.'

SAMUEL NORTEK, OFPIT-TSBURGH, PENNSYLVANIA, AssIGNOR To H; L. nIXoN con- PANY, on PITTSBURGH; PENNsYLvANIA,1A'CORPORATION o-F PENNSYLVANIA.

Application iea'ianuaryia 19231@ senat Noceiavei;

To all whom t may concern:

Be it known thaty I, SAMUEL PORTER, a? citizen of the Unitedy States, residingvat` Pittsburgh, countyv of Allegheny, and Stateof Pennsylvanimhaveinvented anew'anduseful Improvement in Reversing Valves",

of which the followingis al full, clear; and exact description' y i The presentV invention rela-tes to valves, and more particularly to airl reversing valves.

It has Yheretofore been pro-posed to provide a kreversing valve'Y forgas-lired fur-f naces, comprising. aybase -rnenloer having' a central port therein. for communication with the chimney' and two end ports foricommu# nication with the furnace' andra hoodiinov-v able to alternatelyA cover the' centralx and one of the'end ports, and then to coverthe theV valve casing. In an air reversing Y valve for regenerative furnaces,- it has' been ,found desirableV to provide for" the independent regulation of the flow of air-thi'f'o'ugh the two outside ports leading to the rege'nerators. The present invention provides a valve-embodying this desired featurelr.

VThe invention is illustratedV inthe accompanying, drawings, in which Figure 1 is a planvie'w of avalve-'constructed in' accordance with one embodiment of my invention.

/ Figure 2 is a side-elevation ofthe valve shown in Figure 1. l

Figure. 3 is a verticallongitudinal sectional view of vpart of the valve structure shown in Fignrel. y l l FigureY-"is Yvertical longitudinal .sec-' tional vien7 of a .modifiedform of valve,- a portion of the furnace being lshown in .sec'- tionalso. Y

Referring-to the construction'y showniin Figures 1, -21 andA 3,.` the: reversing; valve therein shown comprises.- a! base 2;. in the form of a rectangular pan adaptedtosbe supported" upon theemasonryn of the" furnace fwith its .central port 3f inlcommunica'f tion with the chimneyf,vand withlits two end ports 4' and .5 in communication with-the regene'rators.`

Mounted for movement lo'ngitudinally'vof. the'base 2.is ahood' adapted-to alternately'- coverthe centralport 3 and end port 4fand' thecentralf port 3 and end port 5. Secured to the opposite ends-.of the hood-f6 fare a pair 1 of axles 7, each axle having apair of flanged wheels 8 journaled uponits opposite ends'.v The-opposite sides-9 ofthe base 2 constitute tracks for the wheels-8. The base pani?, normallyholds a quan tityfof water into which the lower edgesV of the'lhoodV eXtendvto form a" seal therefor.` The sidesv9 ofpthe Vbase have cam surfaces 10, 11,112and13 provided in their'upper edges for cooperation withthe wheels 8V for lifting; the hood. at i the beginning Off. its travel 1n either direction suiiiciently to permit the lower endiedges 14 of theihood to clear the tops ofthe ports' 3, 4 and 5,

Thereafter', the hood travels withy a stra-ight i line movement'` until `it reaches the end yof its'travel, when the cam surfaces 1Q zand 1f2- or 11 and 13 permit the hood to lower to bring its end edges 1j4 beneath the surface of thecsealingy fluid. Suitable means, vsuch Y as cables 15,V may be providedv for moving the hood in oppositev directions. v

F-astened to each of .the opposite ends of the hood 6 are 'arpa-ir of brackets 16. Pivotally connected at its lowerv end to'each bracket vis a lever 17. Each bracket is pro# vided with a pair of stopl members^ 18 and 19 ffor limitingl th'eiswinging movement of the corresponding, lever 17.V The upper .ends of the pair of flevers 1.7 lat each end ofthe hood are connected by 'al transverse shaft 20, and suspendedfrom each shaft 2O bymeans of bolts-21 is a valve? member" 22. The shaftsQQ- pass freely throug'li eyes formed integral withthe upper ends ofthefbolts 21, while the loweren'df portions Yof the 'bolts :are screwlthre'aded throughout a Considerable portion; ofcthefi length .of each'byolt.` The thread/ed end portions-of the vbolts f 21 pass througf--1i sui-table openingsin. the valve inem?v bers'. 22, and the i latter J arevv secu-red .inu posi?V tion.r v onf.` .the bolts. by means Y. offnuts V23 and andthe nuts-231.j

Fastened to each of the opposite ends of the base 2 are a pair of standards 26. The upper end portions of each pair of standards are bent inwardly towards the corresponding end of the hood, and joiningthe upper ends of each pair of standards 1s a transverse shaft 27. Journaled upon each of the shafts 27 is a pair of anti-friction rollers 28. The rollers 28 cooperate with the levers 17 to raise the valve members 22 from the position shown at the right hand end of Figure 2 to the position shown at the left hand end of said figure.

The operation of the valve shown lin Figures 1, 2 and 3 is as follows: With the parts in the position shown in Figure 2, the hood 6 covers the ports 3 and 4 and a valve member 22 is in a position to control the port 5. The exhaust gases from the furnace enter the hood 6 through the port 4 after passage through a regenerator and escape through the port 3 to the chimney. At the same time air enters the partially closed port 5 and passes to the corresponding regenerator. The amount of air entering the port 5 may be regulated by adjusting the valve member 22 on the threaded bolts 21. Vhen it is desired tofreverse the direction of flow of the incoming air and of the exhaust gases, the hood 6 is moved to the right, Figure 2. At the beginning of this movement, the cam surfaces 10 and 12 cooperate with the wheels 8 to raise the hood sufficiently for its lower end edges to clear the top edges of the ports 3 and 4. Thereafter, the hood ltravels on an even level until the cam surfaces 11 and 13 are reached, when the hood again lowers to cover theports 3 and 5. During the movement of the hood to the right, the levers 17 at the right hand end of the hood engage the corresponding anti-friction rollers 28, whereby the right hand valve member 22 is raised into a position corresponding to that of the left hand valve member 22, Figures 2 and 3. At the same time, the levers 17 at the left hand end of the hood cooperate with the corresponding rollers 28 to permit the left hand valve member 22 to lower by gravity into a position to control the port 4. It will be seen that either valve member 22 may be adjusted independently of the other for regulating the amount of air flowing through the port which it controls.

In the modified construction shown in Figure 4, a slightly different arrangement is provided for raising and lowering the valve members 22. Each valve member 22 is suspended by means of a single bolt 21 fastened at its upper end to a transverse shaft 20', the latter being j ournaled at its opposite ends in the inner ends ofv toggle levers 17 and 29, the levers 17 being journaled at their outer Vends upon the opposite ends of the axle 7 which carries the flanged wheels8 and the outer ends of the levers 29 beingjournaled ineens@ to the side walls of the base 2 adjacent the ends thereof. The operation of this form of the invention will be obvious from an inspection of Figure 4.

The advantages of the present invention arise from the provisions in combination with a hood of separate and independently adjustable valves for regulating the quantity of air supplied to the furnace.

I claim: i

1. In a valve, a base having a plurality of ports therein, a hood movable to alternately cover and uncover one of said ports, a valve connected to and movable relatively to the hood for controlling said port when uncovered by said hood, and means carried in part by said hood and in part by said base for supporting and actuating said valve substantially'as described.

2. In a valve, a base having a plurality of ports therein, a hood movable to alternately cover and uncover one of said ports, a valve movable relatively to the hood for controlling said port when uncovered by said hood, and means carried in part'by said hood and in part by said base for supporting and actuating said valve, said valve being adjustably connected to its supporting means for varying the flow through said port, substantially as described.

3. In a valve, a base having a plurality of ports therein, a hood movable to alternately cover and uncover one of said ports, a valve for controlling said port when uncovered by said hood, supporting means for said valve pivotally connected to said hood, and abutments secured to said base and arranged to engage said supporting means and thereby move said valve to inoperative position upon movement of said hood into a position covering said port, said supporting means moving kby gravity to carry said valve to operative position upon movement of said hood into a position covering said port, and stops carried byrsaid hood for limiting the movements of said supporting means, substantially as described. f

4. In a reversing valve, a hood for controlling a plurality of ports, said hood being movable to successively cover or uncover certain of said ports, controlling means bodily movable relatively to said hood for cooperation with a port when uncovered by said hood, and means carried at least partly by said hood for maintaining said controlling means at all times in spaced relationship to the port to be controlled therebyand certain of said ports, controlling means bod. ily movable relatively to said hood for cooperation With a port When uncovered by said hood, and means Carried at least partly by said hood for maintaining said controlling means at all time-s in spaced relationship to the port to be controlled thereby and for bodily moving said controlling means relatively to the hood into operative relation to the port as the hood is moved out of operative relation thereto, said controlling means being at all times exterior to the hood, substantially as described.

In testimony whereof I have hereunto set my hand.

SAMUEL PORTER.- 

